ciiqr/zod-optional-null.ts

## zod-optional-null.ts
// zod schema
z.object({
    // valid if string or:
    optional: z.string().optional(), // field not provided, or explicitly `undefined`
    nullable: z.string().nullable(), // field explicitly `null`
    nullish: z.string().nullish(), // field not provided, explicitly `null`, or explicitly `undefined`
});

// type
{
    optional?: string | undefined;
    nullable: string | null;
    nullish?: string | null | undefined;
}
	// zod schema
	z.object({
	// valid if string or:
	optional: z.string().optional(), // field not provided, or explicitly `undefined`
	nullable: z.string().nullable(), // field explicitly `null`
	nullish: z.string().nullish(), // field not provided, explicitly `null`, or explicitly `undefined`
	});

	// type
	{
	optional?: string \| undefined;
	nullable: string \| null;
	nullish?: string \| null \| undefined;
	}